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Re: Residental Walks and Dranage

Supposedly its in the Code somewhere but I've never bothered to look it up. All you need to do is show the client the wall damage from the inward sloping service walk and that pretty much takes care of it.
If someone has actually looked it up and has it that would be great.

www.aic-chicago.com
773/844-4AIC"The Code is not a ceiling to reach but a floor to work up from"

Re: Residental Walks and Dranage

Re: Residental Walks and Dranage

from the 2006 IRC (bold added)
R401.3 Drainage. Surface drainage shall be diverted to a
storm sewer conveyance or other approved point of collection
so as to not create a hazard. Lots shall be graded to drain surfacewater away from foundation walls. The grade shall fall a minimumof6 inches (152 mm)within the first 10 feet (3048 mm).
Exception: Where lot lines, walls, slopes or other physical
barriers prohibit 6 inches (152 mm) of fall within 10 feet
(3048 mm), the final grade shall slope away from the foundation
at a minimum slope of 5 percent and the water shall
be directed to drains or swales to ensure drainage away from
the structure.Swales shall be sloped a minimum of 2 percent
when located within 10 feet (3048 mm) of the building
foundation. Impervious surfaces within 10 feet (3048 mm)
of the building foundation shall be sloped a minimum of 2
percent away from the building.

' correct a wise man and you gain a friend... correct a fool and he'll bloody your nose'.

Re: Residental Walks and Dranage

Rich,

From you, from the 2010 Florida Building Code, Residential:
- R401.3 Drainage.
- - Surface drainage shall be diverted to a storm sewer conveyance or other approved point of collection that does not create a hazard. Lots shall be graded to drain surface water away from foundation walls. The grade shall fall a minimum of 6 inches (152 mm) within the first 10 feet (3048 mm).
- - - Exception: Where lot lines, walls, slopes or other physical barriers prohibit 6 inches (152 mm) of fall within 10 feet (3048 mm), drains or swales shall be constructed to ensure drainage away from the structure. Impervious surfaces within 10 feet (3048 mm) of the building foundation shall be sloped a minimum of 2 percent away from the building.

"Impervious surfaces within 10 feet (3048 mm) of the building foundation shall be sloped a minimum of 2 percent away from the building."

That allows for concrete walkways, stoops, patios, landing, etc., to slope within the requirements of slopes permitted for landings.

Re: Residential Walks and Drainage

It's not a coincidence that most government building and infrastructure construction specifications require a minimum surface slope of 1/4" per foot, for streets, roadways and walking facilities. In round numbers, 1/4" = 0.0208', or darn close to 2%. In the olden days, when slide rules were the common engineering office tool, it used to be 1.5% minimum slope.

Re: Residential Walks and Drainage

Originally Posted by BridgeMan

It's not a coincidence that most government building and infrastructure construction specifications require a minimum surface slope of 1/4" per foot, for streets, roadways and walking facilities. In round numbers, 1/4" = 0.0208', or darn close to 2%. In the olden days, when slide rules were the common engineering office tool, it used to be 1.5% minimum slope.

2% = 1/50

1/4" per foot = 1/48

Like you said "darn close".

Engineers are used to thinking in decimals ... contractors are used to thinking in inches/foot

Re: Residential Walks and Drainage

Originally Posted by BridgeMan

It's not a coincidence that most government building and infrastructure construction specifications require a minimum surface slope of 1/4" per foot, for streets, roadways and walking facilities. In round numbers, 1/4" = 0.0208', or darn close to 2%. In the olden days, when slide rules were the common engineering office tool, it used to be 1.5% minimum slope.

Which makes an interesting issue. The landing must be level. The sidewalk, if parallel to the house must be sloped 1/4" to the foot away from the house.

So, for a 36" sidewalk that is terminated at a landing, and parallel to the house, would be level at the landing at the side that is adjacent to the house, and 3/4" lower at the side further from the house. Would the "Trip hazard" enter into this situation at the landing?

I know the common sense aproach would be that the first slab would start level with the landing and end with a slope, but the issue interests me.

Re: Residential Walks and Drainage

The sidewalk, if parallel to the house must be sloped 1/4" to the foot away from the house.

So, for a 36" sidewalk that is terminated at a landing, and parallel to the house, would be level at the landing at the side that is adjacent to the house, and 3/4" lower at the side further from the house. Would the "Trip hazard" enter into this situation at the landing?

Re: Residental Walks and Dranage

I sent a note into the builder saying that the sidewalk in the front of the house did not meet the Florida building code requirements for drainage, and that I wanted it replaced from the driveway to the landing.

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